Lines Matching refs:fuzzer
14 library via a specific fuzzing entrypoint (aka "target function"); the fuzzer
76 In order to build your fuzzer binary, use the `-fsanitize=fuzzer` flag during the
81 …clang -g -O1 -fsanitize=fuzzer mytarget.c # Builds the fuzz target w/o san…
82 …clang -g -O1 -fsanitize=fuzzer,address mytarget.c # Builds the fuzz target with AS…
83 …clang -g -O1 -fsanitize=fuzzer,signed-integer-overflow mytarget.c # Builds the fuzz target with a …
84 …clang -g -O1 -fsanitize=fuzzer,memory mytarget.c # Builds the fuzz target with MS…
87 Note that ``-fsanitize=fuzzer`` links in the libFuzzer's ``main()`` symbol.
93 clang -fsanitize=fuzzer-no-link mytarget.c
96 ``-fsanitize=fuzzer`` during the linking stage.
107 files. The fuzzer generates random mutations based around the sample inputs in
139 To run the fuzzer, first create a Corpus_ directory that holds the
147 Then run the fuzzer on the corpus directory:
153 As the fuzzer discovers new interesting test cases (i.e. test cases that
170 inputs found by one fuzzer process will be available to the other fuzzer
211 and use ``killall -SIGUSR1 /path/to/fuzzer/binary`` to stop the merge gracefully. Example:
235 To run the fuzzer, pass zero or more corpus directories as command line
236 arguments. The fuzzer will read test inputs from each of these corpus
242 ./fuzzer [-flag1=val1 [-flag2=val2 ...] ] [dir1 [dir2 ...] ]
244 If a list of files (rather than directories) are passed to the fuzzer program,
246 In this mode the fuzzer binary can be used as a regression test (e.g. on a
275 If non-zero, the fuzzer will exit if the target tries to allocate this
283 If positive, indicates the maximum total time in seconds to run the fuzzer.
345 For the full list of flags run the fuzzer binary with ``-help=1``.
350 During operation the fuzzer prints information to ``stderr``, for example::
364 The early parts of the output include information about the fuzzer options and
372 The fuzzer has read in all of the provided input samples from the corpus
375 The fuzzer has completed initialization, which includes running each of
378 The fuzzer has created a test input that covers new areas of the code
381 The fuzzer has found a better (smaller) input that triggers previously
384 The fuzzer has generated 2\ :sup:`n` inputs (generated periodically to reassure
385 the user that the fuzzer is still working).
387 The fuzzer has completed operation because it has reached the specified
390 The fuzzer is performing a periodic reload of inputs from the corpus
392 fuzzer processes (see `Parallel Fuzzing`_).
408 Number of fuzzer iterations per second.
445 clang++ -fsanitize=address,fuzzer test_fuzzer.cc
446 # Run the fuzzer with no corpus.
505 (on by default as part of ``-fsanitize=fuzzer``, see SanitizerCoverageTraceDataFlow_)
513 With ``-fsanitize-coverage=trace-cmp`` (default with ``-fsanitize=fuzzer``)
514 and extra run-time flag ``-use_value_profile=1`` the fuzzer will
536 even if the end result will be the same. This will cause a fuzzer to treat
574 see an example `here <https://github.com/llvm/llvm-project/tree/main/compiler-rt/lib/fuzzer/afl>`__.
576 How good is my fuzzer?
586 (`example <https://github.com/google/fuzzer-test-suite/blob/master/tutorial/libFuzzerTutorial.md#vi…
623 invoke libFuzzer as a library. Be sure to pass ``-fsanitize=fuzzer-no-link``
678 since the fuzzer needs to report a leak with a reproducer as soon as the leaky
699 Tests are run using ``check-fuzzer`` target from the build directory
704 ninja check-fuzzer
723 coverage set of the process (since the fuzzer is in-process). In other words, by
724 using more external dependencies we will slow down the fuzzer while the main
750 in-process fuzzer with all sanitizers to detect most bugs on the spot.
751 * It is harder to protect the in-process fuzzer from excessive memory
756 the in-process fuzzer interface (e.g. require a file path instead of a
759 more) the speed benefit from the in-process fuzzer is negligible.
790 * PCRE: Search for "LLVM fuzzer" in http://vcs.pcre.org/pcre2/code/trunk/ChangeLog?view=markup;
808 * `Linux Kernel's BPF verifier <https://github.com/iovisor/bpf-fuzzer>`_
840 .. _FuzzerInterface.h: https://github.com/llvm/llvm-project/blob/main/compiler-rt/lib/fuzzer/Fuzzer…